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Background: The purpsose of this study was to evaluate the biomechanical outcomes of patients who underwent ACL reconstruction either with the DB or SB technique. We hypothesized that the DB technique would provide better rotation control of the knee following ACL reconstruction. Methods: The study included seventy-five participants (26 DB, 22 SB, and 27 healthy volunteers). Only cases with at least one year of postoperative follow-up were included. The participants performed three different demand tasks: walk task, walk and change direction, and stair descent and change direction, which was tracked using a three-dimensional 4-camera optoelectronic system. The following kinematic data were analyzed: tibial rotation amplitude and maximal internal and external rotation. Knees with ACL reconstruction were compared to contralateral knees with intact ACL and healthy knees. Clinical outcomes were determined using the subjective and objective International Knee Documentation Committee (IKDC) questionnaire and a manual arthrometer (KT 1000). Results: Both surgical groups exhibited similar clinical outcomes (mean subjective IKDC 91 SB vs. 90 DB, P=0.815; KT 1000 difference: 2mm in both groups, P=0.772). The vertical component of the ground force reaction revealed no differences between the surgical and control groups (P>0.05). Tibial rotation amplitude and maximal internal and external rotation were similar between the control, SB, and DB groups in all three different demand tasks (P>0.05). Conclusion: ACL reconstruction using either the SB or DB technique can restore rotational control to the level of a healthy knee. No clinical or functional differences were found between the SB and DB surgical options.
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Meniscal root tears represent radial tears or avulsions of the meniscal cartilage at the tibial attachment site that profoundly affect meniscal biomechanics and kinematics. Meniscal root tears have the functional effect of a total meniscectomy and can lead to rapid degenerative change with development of early knee osteoarthritis (OA). A growing range of arthroscopic surgical techniques have been developed to repair meniscal root tears with the aim of restoring joint kinematics and contact pressures and delaying the development of OA. With increased understanding of the anatomy and biomechanics of the meniscal root, meniscal root injury repair has become the treatment of choice in knees with nonadvanced OA. This article reviews the anatomy and biomechanics of the meniscal roots, clinical and imaging diagnostic criteria of meniscal root tears, correlation between arthroscopy and MRI in the diagnosis and classification of meniscal root tears, and expected and abnormal MRI findings after meniscal root repair. Familiarity with MRI signs and classifications of meniscal root tears, as well as with root repair surgical techniques, can aid radiologists in correctly reporting preoperative and postoperative MRI findings.
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Traumatismos do Joelho , Lesões do Menisco Tibial , Artroscopia/métodos , Humanos , Traumatismos do Joelho/diagnóstico por imagem , Traumatismos do Joelho/cirurgia , Imageamento por Ressonância Magnética/métodos , Meniscos Tibiais/anatomia & histologia , Meniscos Tibiais/diagnóstico por imagem , Meniscos Tibiais/cirurgia , Lesões do Menisco Tibial/diagnóstico por imagem , Lesões do Menisco Tibial/cirurgiaRESUMO
BACKGROUND: This study retrospectively evaluated the medium- and long-term results of patients submitted to double-bundle (DB) anterior cruciate ligament (ACL) reconstruction. METHODS: A retrospective study of case series at a single center. Cases submitted to isolated ACL reconstruction with at least five years of follow-up were included. The following data were collected: demographic data; practice of competitive sport before the injury; previous surgery; injury/surgery in the contralateral knee; return to the practices of sports and level; re-injury (postoperative time; mechanism; need for surgery); and symptoms at the last clinical follow-up visit. Descriptive and sub-group analyses were performed. RESULTS: Sixty-nine patients were included; 52 men (75%), 49 athletes (71%), 47 (68%) with primary injury, mean age of 30 years (SD 10). The patients were followed up for an average of 8.7 years (minimum 5, maximum 11.8) after surgery. After the reconstruction, 67 (97%) returned to the sport; 75% at the same level as before the injury. Ten patients (14%) suffered re-injury after an average of 32 months (between 9 and 50 months). Regarding the outcome of re-injury, no statistically significant differences were found between subgroups of athletes vs non-athletes or primary injury vs revision surgery, despite a significant tendency towards increased re-injury levels in athletes. However, this tendency was not statistically significant. CONCLUSION: In our series of patients operated on with the double-bundle technique and with a long follow-up time, 14% presented re-injury, with no differences between primary and revision cases, and with a trend towards higher re-injury levels among the athletes in relation to the non-athletes. The rate of return to sport was satisfactory, with 97%, of which 75% were playing at the same level as before the injury.
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Objective Arthroscopic Latarjet has been performed with the aim to be an accurate technique with a low incidence of complications. The aim of the present study was to briefly describe the technique and to evaluate the shot-term complications following arthroscopic Latarjet procedure to correct anterior shoulder dislocation with glenoid bone loss. Methods Retrospective study with 30 subjects with anterior shoulder instability, submitted to arthroscopic Latarjet. Intraoperative and short-term postoperative complications were recorded, as well as the rate of revision surgery. Results Five cases had complication (16.7%), and in the last 10 cases no complication occurred. In 1 case (3.3%), it was required to reverse for open surgery due to a fracture of the coracoid process during fixation in the glenoid. No other intraoperative complication occurred. No infection was observed. Two cases (6.7%) evolved with temporary neuropraxia of the musculocutaneous nerve, totally reversed with physiotherapy. With a follow-up from 6 to 26 months, 2 patients (6.7%) required a new intervention for graft/screws removal and release of the joint due to excessive limitation in external rotation. There was no case of recurrence. Conclusion Even in an initial learning curve, arthroscopic Latarjet demonstrated a low rate of short-tem complications and was a safe procedure for treating anterior dislocation of the shoulder with glenoid bone loss.
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Abstract Objective Arthroscopic Latarjet has been performed with the aim to be an accurate technique with a low incidence of complications. The aim of the present study was to briefly describe the technique and to evaluate the shot-term complications following arthroscopic Latarjet procedure to correct anterior shoulder dislocation with glenoid bone loss. Methods Retrospective study with 30 subjects with anterior shoulder instability, submitted to arthroscopic Latarjet. Intraoperative and short-term postoperative complications were recorded, as well as the rate of revision surgery. Results Five cases had complication (16.7%), and in the last 10 cases no complication occurred. In 1 case (3.3%), it was required to reverse for open surgery due to a fracture of the coracoid process during fixation in the glenoid. No other intraoperative complication occurred. No infection was observed. Two cases (6.7%) evolved with temporary neuropraxia of the musculocutaneous nerve, totally reversed with physiotherapy. With a follow-up from 6 to 26 months, 2 patients (6.7%) required a new intervention for graft/screws removal and release of the joint due to excessive limitation in external rotation. There was no case of recurrence. Conclusion Even in an initial learning curve, arthroscopic Latarjet demonstrated a low rate of short-tem complications and was a safe procedure for treating anterior dislocation of the shoulder with glenoid bone loss.
Resumo Objetivo A realização da cirurgia de Latarjet por via artroscópica tem sido possível pelo desenvolvimento de instrumentais adequados e um protocolo para cirurgia estabelecido e reprodutível, que promete uma técnica mais precisa e com menor incidência de complicações. O objetivo do presente estudo foi fazer uma breve descrição de técnica cirúrgica e avaliar as complicações de curto prazo após a cirurgia de Latarjet por via artroscópica para correção de luxação anterior do ombro com perda óssea glenoidal. Método Estudo retrospectivo com 30 pacientes com instabilidade anterior do ombro, operados com a técnica de Latarjet por via artroscópica. Foram feitas avaliação das complicações intraoperatórias e pós-operatório de curto prazo e documentação de necessidade de reintervenções. Resultados Cinco casos tiveram complicação (16,7%), sendo que nos últimos 10 casos nenhuma complicação foi observada. Em 1 caso (3,3%) foi necessária conversão para cirurgia aberta por fratura do processo coracoide no momento de fixação na glenoide. Nenhum outro caso apresentou complicação intraoperatória. Não houve infecção nos casos operados. Dois casos (6,7%) evoluíram com neuropraxia temporária do musculocutâneo, revertida com fisioterapia. Em tempo de seguimento de 6 a 26 meses, 2 pacientes (6,7%) necessitaram de nova intervenção para retirada do material de síntese e liberação articular por excessiva limitação da rotação externa. Não houve caso de recidiva. Conclusão O procedimento de Latarjet artroscópico se mostrou seguro e com baixa incidência de complicações de curto prazo para correção da luxação anterior no ombro com perda óssea na glenoide mesmo em curva inicial de aprendizagem.
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Humanos , Complicações Pós-Operatórias , Artroscopia , Ombro , Luxação do Ombro , Osso e Ossos , Incidência , Procedimentos Cirúrgicos Minimamente Invasivos , Fraturas ÓsseasRESUMO
INTRODUCTION: We attended three skeletally immature patients with Down syndrome (DS) with complaints of severe patellofemoral instability and dislocated patella (preoperatively, Dugdale classification IV or V), in addition to low functional capacity, with falls during gait. The technique (lateral release, medial capsulectomy, reconstruction of the medial patellofemoral ligament (MPFL) with the patellar ligament and associated techniques, and some knees) and results in three children with DS and bilaterally dislocated patella were revealed. CASE REPORT: Our minimum follow-up was 27 months and maximum was 105 months (average of 64 months). All children improved gait, patellar stability, Kujala (58.13%), and subjective IDKC (40.55%) scores and improved the congruence and the trochlea groove angles. CONCLUSION: The patellofemoral instability in children with DS is a challenge. We should use an arsenal of surgical techniques in this complex problem. We believe in early surgery to improve the formation of structures, especially in patients with gross instabilities and frequent falls. In all cases, we detected a weakness of medial components and lateral contracture, reconstructed the MPFL (we were the first researchers to describe this procedure for this group of patients), and performed a medial capsulectomy and lateral release. In some knees, intraoperatively, it was necessary to associate the reconstruction of the medial patellotibial ligament to improve instability. We consider fundamental analysis of the axis with panoramic radiographs and hemiepiphysiodes is in cases of asymmetric or severe valgus.
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Few complications regarding the use of bioabsorbable suture anchors in the shoulder have been reported. What motivated this case report was the unusual location of the anchor, found in the acromioclavicular joint which, to our knowledge, has never been reported so far. A 53-year old male with previous rotator cuff (RC) repair using bioabsorbable suture anchors presented with pain and weakness after 2 years of surgery. A suspicion of retear of the RC led to request of a magnetic resonance image, in which the implant was found located in the acromioclavicular joint. The complications reported with the use of metallic implants around the shoulder led to the development of bioabsorbable anchors. Advantages are their absorption over time, minimizing the risk of migration or interference with revision surgery, less artifacts with magnetic resonance imaging, and tendon-to-bone repair strength similar to metallic anchors. Since the use of bioabsorbable suture anchors is increasing, it is important to know the possible complications associated with these devices.
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BACKGROUND: Over the long term, acute patellar dislocations can result in patellar instability, with high recurrence rates after nonoperative treatment. PURPOSE: To compare the results of operative (reconstruction of the medial patellofemoral ligament [MPFL]) versus nonoperative treatment of primary patellar dislocation. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: Thirty-nine patients (41 knees) (mean age, 24.2 years; range, 12-38 years) with acute patellar dislocation were randomized into 2 groups. One group was treated nonoperatively with immobilization and physiotherapy, the other was treated surgically with MPFL reconstruction; both groups were evaluated with minimum follow-up of 2 years. The Kujala questionnaire was applied to assess pain and quality of life, and recurrence was evaluated. Pearson χ(2) or Fisher exact test was used in the statistical evaluation. RESULTS: The statistical analysis showed that the mean Kujala score was significantly lower in the nonoperative group (70.8), when compared with the mean value of the surgical group (88.9; P = .001). The surgical group presented a higher percentage of "good/excellent" results (71.43%) on the Kujala score when compared with the nonoperative group (25.0%; P = .003). The nonoperative group presented a large number of recurrences and subluxations (7 patients; 35% of cases), whereas there were no reports of recurrences or subluxations in the surgical group. CONCLUSION: Treatment with MPFL reconstruction using the patellar tendon produced better results, based on the analyses of posttreatment recurrences and the better final results of the Kujala questionnaire after a minimum follow-up period of 2 years.
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Instabilidade Articular/terapia , Luxação Patelar/terapia , Ligamento Patelar/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Adolescente , Adulto , Análise de Variância , Braquetes , Distribuição de Qui-Quadrado , Criança , Crioterapia , Terapia por Estimulação Elétrica , Feminino , Humanos , Imobilização , Instabilidade Articular/cirurgia , Masculino , Luxação Patelar/cirurgia , Ligamento Patelar/lesões , Modalidades de Fisioterapia , Estudos Prospectivos , Amplitude de Movimento Articular , Recidiva , Inquéritos e Questionários , Resultado do TratamentoRESUMO
BACKGROUND: More than 2 years after undergoing anterior cruciate ligament (ACL) reconstruction, women still present bilateral asymmetries during multijoint movement tasks. Given the well-known ACL-injury gender bias, the goal of this study was to investigate whether males also present such asymmetries more than 2 years after undergoing ACL reconstruction. METHODS: This study involved 12 participants submitted to ACL reconstruction in the ACL group and 17 healthy participants in the control group. The mean postoperative period was 37 months. The participants executed bilateral countermovement jumps and load squat tasks. The kinematics and ground reaction forces on each lower limb and pelvis were recorded, and used to compute bilateral peak vertical ground reaction forces, peak knee and hip joint powers in the sagittal plane, and the ratio between these powers. RESULTS: For the jump task, the groups had the same performance in the jump height, but for the ACL group the peak knee joint power on the operated side was 13% lower than on the non-operated side (p = 0.02). For the squat task, the hip-knee joint power ratio on the operated side of the ACL group was 31% greater than on the non-operated side (p = 0.02). CONCLUSIONS: The ACL group presented a deficit in the operated knee that had its energy generation over time (joint power) partially substituted by the hip joint power of the same side. The fact that, even after more than 2 years following the ACL reconstruction and returning to regular activity, the ACL group still had neuromuscular asymmetries suggests a need for improvement in the ACL reconstruction surgery procedures and/or rehabilitation protocols.
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Lesões do Ligamento Cruzado Anterior , Ligamento Cruzado Anterior/fisiopatologia , Traumatismos do Joelho/fisiopatologia , Movimento/fisiologia , Adulto , Ligamento Cruzado Anterior/cirurgia , Fenômenos Biomecânicos , Exercício Físico/fisiologia , Feminino , Humanos , Masculino , Procedimentos de Cirurgia Plástica , RupturaRESUMO
OBJETIVO: O objetivo deste estudo é descrever a metodologia da análise da rotação do joelho utilizando instrumentos do laboratório de biomecânica e apresentar os resultados preliminares de um estudo comparativo com pacientes submetidos à reconstrução do ligamento cruzado anterior com a técnica de duplo feixe. MÉTODOS: Descreveu-se o protocolo atualmente utilizado em nosso laboratório e realizou-se a análise cinemática tridimensional e medida da amplitude de rotação do joelho de oito pacientes normais (grupo controle) e 12 pacientes operados com a técnica de duplo feixe em três tarefas no laboratório de biomecânica. RESULTADOS: Não indicam diferenças significativas entre os lados operados e não operados em relação às amplitudes médias da marcha, da marcha com mudança de direção ou da marcha com mudança de direção ao descer a escada (p > 0,13). CONCLUSÕES: Os resultados preliminares não demonstraram diferença da técnica de reconstrução de LCA em duplo feixe em relação ao lado contralateral e ao grupo controle.
OBJECTIVE: The objective of this study was to describe the methodology of knee rotation analysis using biomechanics laboratory instruments and to present the preliminary results from a comparative study on patients who underwent anterior cruciate ligament (ACL) reconstruction using the double-bundle technique. METHODS: The protocol currently used in our laboratory was described. Three-dimensional kinematic analysis was performed and knee rotation amplitude was measured on eight normal patients (control group) and 12 patients who were operated using the double-bundle technique, by means of three tasks in the biomechanics laboratory. RESULTS: No significant differences between operated and non-operated sides were shown in relation to the mean amplitudes of gait, gait with change in direction or gait with change in direction when going down stairs (p > 0.13). CONCLUSION: The preliminary results did not show any difference in the double-bundle ACL reconstruction technique in relation to the contralateral side and the control group.